Sense Organs
Gbogbo ọrọ náà
Close one eye and try to thread a needle, and the task suddenly gets harder, not because you can see less, but because you have lost the ability to judge distance accurately. The two sense organs in this topic, the eye and the ear, do far more than simply detect light and sound: they focus, protect themselves from damage, and, in the ear's case, also keep you upright.
This topic covers how the eye focuses on near and distant objects and adjusts to changing light, why two eyes give better depth judgment than one, the common eye defects and how they are corrected, the structure of the ear in hearing and balance, the damage prolonged loud noise can cause, and how the range of frequencies audible to the human ear can be measured.
Ebumnobi
- Explain the structure and function of the eye in focusing on near and distant objects, responding to changes in light intensity, and stereoscopic vision allowing better judgment of distance
- Understand eye defects and their treatment: long sight, short sight, astigmatism, cataracts, and the use of corneal transplants
- Explain the structure and function of the ear in balance and hearing
- Understand how prolonged exposure to high noise levels affects the functioning of the ear and hearing
- Investigate the range of frequency audible to the human ear
Maapụ uche
E seela isiokwu a ka ị hụ otu echiche si ejikọta.
Mepee maapụ uche na ngwa
Kaadị ncheta
Omume ncheta ngwa ngwa n'ihe a na-anwale n'isiokwu a.
Mee omume kaadị ndị a na ngwa
Akwụkwọ Ọmụmụ
Ndetu Nkuzi Zuru Ezu di na Ngwa Green Bridge
Nweta ngwa Green Bridge CBT na ekwenti gi ma o bu kompiuta maka ulo akwukwo IGCSE zuru oke: akwukwo ule ndi gara aga, usoro nyocha, eserese uche, kaadi omumu na nkuzi olu.
Nnyocha Ọmụmụ
Ekele diri gi maka imecha ihe karịrị na Sense Organs. Ugbu a na ị na-enyochakwa isi echiche na echiche ndị dị mkpa, ọ bụ oge iji nwalee ihe ị ma. Ngwa a na-enye ụdị ajụjụ ọmụmụ dị iche iche emebere iji kwado nghọta gị wee nyere gị aka ịmata otú ị ghọtara ihe ndị a kụziri.
Ị ga-ahụ ngwakọta nke ụdị ajụjụ dị iche iche, gụnyere ajụjụ chọrọ ịhọrọ otu n’ime ọtụtụ azịza, ajụjụ chọrọ mkpirisi azịza, na ajụjụ ede ede. A na-arụpụta ajụjụ ọ bụla nke ọma iji nwalee akụkụ dị iche iche nke ihe ọmụma gị na nkà nke ịtụgharị uche.
Jiri akụkụ a nke nyocha ka ohere iji kụziere ihe ị matara banyere isiokwu ahụ ma chọpụta ebe ọ bụla ị nwere ike ịchọ ọmụmụ ihe ọzọ. Ekwela ka nsogbu ọ bụla ị na-eche ihu mee ka ị daa mba; kama, lee ha anya dị ka ohere maka ịzụlite onwe gị na imeziwanye.
- When focusing on a distant object, what happens to the ciliary muscles and the lens? A) Ciliary muscles contract, lens becomes thicker B) Ciliary muscles relax, lens becomes thinner C) Ciliary muscles contract, lens becomes thinner D) Ciliary muscles relax, lens becomes thicker Answer: B
- Which eye defect is caused by an eyeball that is too long, so light from distant objects focuses in front of the retina? A) Long sight (hyperopia) B) Astigmatism C) Short sight (myopia) D) Cataracts Answer: C
- Which structure in the ear detects rotation of the head for balance? A) Cochlea B) Ossicles C) Eardrum D) Semicircular canals Answer: D
- The approximate range of frequency audible to a healthy young human ear is: A) 2 Hz to 2,000 Hz B) 20 Hz to 20,000 Hz C) 200 Hz to 200,000 Hz D) 2,000 Hz to 2,000,000 Hz Answer: B
- Cataracts are caused by: A) An eyeball that is too short B) An unevenly curved cornea C) A cloudy lens D) Damage to the cochlea Answer: C
Rue ajuju ndi a n'ime ngwa ahu
Rue ajuju ndi a n'ime ngwa ahu
Akwụkwọ A Na-atụ Aro
Mụtakwuo ihe site na isi mmalite mepere emepe
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Akụkụ akwụkwọ
Vision
Explain how electromagnetic waves differs from sound waves
"Biology: Vision" by OpenStax, OpenStax, Rice University, licensed under CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/). Source: https://openstax.org/books/biology/pages/36-5-vision. Access for free at https://openstax.org/books/biology/pages/1-introduction
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Akụkụ akwụkwọ
Hearing and Vestibular Sensation
Describe the relationship of amplitude and frequency of a sound wave to attributes of sound
"Biology: Hearing and Vestibular Sensation" by OpenStax, OpenStax, Rice University, licensed under CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/). Source: https://openstax.org/books/biology/pages/36-4-hearing-and-vestibular-sensation. Access for free at https://openstax.org/books/biology/pages/1-introduction
Ndị otu ndị ọzọ bipụtara ha n'okpuru ikike mepere emepe, anyị na-ekele ha dị ka ha si chọọ. Njikọ na-emepe saịtị ha.
Meecha Ajụjụ Ule Ọmarịcha
Ị chọrọ ime ajụjụ ule ọmarịcha gbasara Sense Organs? Budata ngwa Green Bridge CBT iji nweta ajụjụ ule ọmarịcha na nyocha zuru ezu gbasara isiokwu a.
Budata Ngwa Ahụ Na Google Playstore
Ihe nile ichoro iji nwee ihe ịga nke ọma na JAMB, WAEC & NECO.
